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From cross...@apache.org
Subject svn commit: r345438 [8/286] - in /cocoon/site/site/2.1: ./ developing/ developing/portal/ developing/portal/coplets/ developing/webapps/ developing/webapps/authentication/ faq/ howto/ installing/ plan/ plan/documentation/ plan/otherplanning/ plan/overv...
Date Fri, 18 Nov 2005 04:13:22 GMT
Added: cocoon/site/site/2.1/developing/extending.html
URL: http://svn.apache.org/viewcvs/cocoon/site/site/2.1/developing/extending.html?rev=345438&view=auto
==============================================================================
--- cocoon/site/site/2.1/developing/extending.html (added)
+++ cocoon/site/site/2.1/developing/extending.html Thu Nov 17 20:00:02 2005
@@ -0,0 +1,1468 @@
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+<meta content="Apache Forrest" name="Generator">
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+<title>Extending Apache Cocoon</title>
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+<a href="../../2.1/userdocs/default/wildcarduri-matcher.html">WildCard URI Matcher</a>
+</div>
+</div>
+<div onclick="SwitchMenu('menu_1.2.5.3.4.3', '../../skin/')" id="menu_1.2.5.3.4.3Title" class="menutitle">Core</div>
+<div id="menu_1.2.5.3.4.3" class="menuitemgroup">
+<div class="menuitem">
+<a href="../../2.1/userdocs/core/wildcarduri-matcher.html">WildCard URI Matcher</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/core/wildcardheader-matcher.html">WildCard Header Matcher</a>
+</div>
+</div>
+<div onclick="SwitchMenu('menu_1.2.5.3.4.4', '../../skin/')" id="menu_1.2.5.3.4.4Title" class="menutitle">Optional</div>
+<div id="menu_1.2.5.3.4.4" class="menuitemgroup">
+<div class="menuitem">
+<a href="../../2.1/userdocs/optional/template-matcher.html">Template Matcher</a>
+</div>
+</div>
+</div>
+<div onclick="SwitchMenu('menu_1.2.5.3.5', '../../skin/')" id="menu_1.2.5.3.5Title" class="menutitle">Selectors</div>
+<div id="menu_1.2.5.3.5" class="menuitemgroup">
+<div class="menuitem">
+<a href="../../2.1/userdocs/selectors.html">Overview</a>
+</div>
+<div onclick="SwitchMenu('menu_1.2.5.3.5.2', '../../skin/')" id="menu_1.2.5.3.5.2Title" class="menutitle">Default</div>
+<div id="menu_1.2.5.3.5.2" class="menuitemgroup">
+<div class="menuitem">
+<a href="../../2.1/userdocs/default/browser-selector.html">Browser Selector</a>
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+</div>
+<div onclick="SwitchMenu('menu_1.2.5.3.5.3', '../../skin/')" id="menu_1.2.5.3.5.3Title" class="menutitle">Core</div>
+<div id="menu_1.2.5.3.5.3" class="menuitemgroup">
+<div class="menuitem">
+<a href="../../2.1/userdocs/browser-selector.html">Browser Selector</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/host-selector.html">Host Selector</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/parameter-selector.html">Parameter Selector</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/requestattribute-selector.html">Request Attribute Selector</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/requestmethod-selector.html">Request Method Selector</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/requestparameter-selector.html">Request Parameter Selector</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/resourceexists-selector.html">Resource Exists Selector</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/regular-expression-header-selector.html">Regular-expression Header Selector</a>
+</div>
+</div>
+<div onclick="SwitchMenu('menu_1.2.5.3.5.4', '../../skin/')" id="menu_1.2.5.3.5.4Title" class="menutitle">Scratchpad</div>
+<div id="menu_1.2.5.3.5.4" class="menuitemgroup">
+<div class="menuitem">
+<a href="../../2.1/userdocs/scratchpad/date-selector.html">Date Selector</a>
+</div>
+</div>
+</div>
+<div onclick="SwitchMenu('menu_1.2.5.3.6', '../../skin/')" id="menu_1.2.5.3.6Title" class="menutitle">Actions</div>
+<div id="menu_1.2.5.3.6" class="menuitemgroup">
+<div class="menuitem">
+<a href="../../2.1/userdocs/actions.html">Overview</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/database-actions.html">Database</a>
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+<div onclick="SwitchMenu('menu_1.2.5.3.6.3', '../../skin/')" id="menu_1.2.5.3.6.3Title" class="menutitle">Optional</div>
+<div id="menu_1.2.5.3.6.3" class="menuitemgroup">
+<div class="menuitem">
+<a href="../../2.1/userdocs/optional/sendmail-action.html">Sendmail Action</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/optional/session-action.html">Session Action</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/optional/script-action.html">Script Action</a>
+</div>
+</div>
+</div>
+<div onclick="SwitchMenu('menu_1.2.5.3.7', '../../skin/')" id="menu_1.2.5.3.7Title" class="menutitle">Readers</div>
+<div id="menu_1.2.5.3.7" class="menuitemgroup">
+<div class="menuitem">
+<a href="../../2.1/userdocs/readers.html">Overview</a>
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+<div onclick="SwitchMenu('menu_1.2.5.3.7.2', '../../skin/')" id="menu_1.2.5.3.7.2Title" class="menutitle">Default</div>
+<div id="menu_1.2.5.3.7.2" class="menuitemgroup">
+<div class="menuitem">
+<a href="../../2.1/userdocs/default/resource-reader.html">Resource Reader</a>
+</div>
+</div>
+<div onclick="SwitchMenu('menu_1.2.5.3.7.3', '../../skin/')" id="menu_1.2.5.3.7.3Title" class="menutitle">Core</div>
+<div id="menu_1.2.5.3.7.3" class="menuitemgroup">
+<div class="menuitem">
+<a href="../../2.1/userdocs/core/image-reader.html">Image Reader</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/core/resource-reader.html">Resource Reader</a>
+</div>
+</div>
+<div onclick="SwitchMenu('menu_1.2.5.3.7.4', '../../skin/')" id="menu_1.2.5.3.7.4Title" class="menutitle">Optional</div>
+<div id="menu_1.2.5.3.7.4" class="menuitemgroup">
+<div class="menuitem">
+<a href="../../2.1/userdocs/optional/axisrpc-reader.html">AxisRPC Reader</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/optional/database-reader.html">Database Reader</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/optional/jsp-reader.html">JSP Reader</a>
+</div>
+</div>
+<div onclick="SwitchMenu('menu_1.2.5.3.7.5', '../../skin/')" id="menu_1.2.5.3.7.5Title" class="menutitle">Scratchpad</div>
+<div id="menu_1.2.5.3.7.5" class="menuitemgroup">
+<div class="menuitem">
+<a href="../../2.1/userdocs/scratchpad/directoryziparchiver-reader.html">Directory ZIP Archiver</a>
+</div>
+</div>
+</div>
+</div>
+<div onclick="SwitchMenu('menu_1.2.5.4', '../../skin/')" id="menu_1.2.5.4Title" class="menutitle">Flow</div>
+<div id="menu_1.2.5.4" class="menuitemgroup">
+<div class="menuitem">
+<a href="../../2.1/userdocs/flow/index.html">Introduction</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/flow/continuations.html">Continuations</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/flow/how-does-it-work.html">How does it work?</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/flow/using.html">Usage</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/flow/tutor.html">Tutorial</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/flow/sitemap.html">Sitemap</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/flow/api.html">Flowscript</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/flow/java.html">Calling Java</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/flow/views.html">Views</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/flow/jxtemplate.html">JXTemplate</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/flow/jpath.html">JPath</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/flow/velocity.html">Velocity</a>
+</div>
+</div>
+<div onclick="SwitchMenu('menu_1.2.5.5', '../../skin/')" id="menu_1.2.5.5Title" class="menutitle">Cocoon Forms</div>
+<div id="menu_1.2.5.5" class="menuitemgroup">
+<div onclick="SwitchMenu('menu_1.2.5.5.1', '../../skin/')" id="menu_1.2.5.5.1Title" class="menutitle">Basics</div>
+<div id="menu_1.2.5.5.1" class="menuitemgroup">
+<div class="menuitem">
+<a href="../../2.1/userdocs/basics/index.html">Introduction</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/basics/sample.html">Sample</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/basics/improving_sample.html">Improving the sample</a>
+</div>
+</div>
+<div onclick="SwitchMenu('menu_1.2.5.5.2', '../../skin/')" id="menu_1.2.5.5.2Title" class="menutitle">Widgets</div>
+<div id="menu_1.2.5.5.2" class="menuitemgroup">
+<div class="menuitem">
+<a href="../../2.1/userdocs/widgets/widget_form.html">form</a>
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+<div class="menuitem">
+<a href="../../2.1/userdocs/widgets/widget_field.html">field</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/widgets/widget_multivaluefield.html">multivaluefield</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/widgets/widget_booleanfield.html">booleanfield</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/widgets/widget_repeater.html">repeater</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/widgets/widget_output.html">output</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/widgets/widget_submit.html">submit</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/widgets/widget_action.html">action</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/widgets/widget_repeater_action.html">repeater-action</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/widgets/widget_row_action.html">row-action</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/widgets/widget_aggregatefield.html">aggregatefield</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/widgets/widget_upload.html">upload</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/widgets/widget_messages.html">messages</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/widgets/widget_imagemap.html">imagemap</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/widgets/widget_tree.html">tree</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/widgets/widget_group.html">group/struct</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/widgets/widget_union.html">union</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/widgets/widget_class.html">class/new</a>
+</div>
+</div>
+<div onclick="SwitchMenu('menu_1.2.5.5.3', '../../skin/')" id="menu_1.2.5.5.3Title" class="menutitle">Widget Concepts</div>
+<div id="menu_1.2.5.5.3" class="menuitemgroup">
+<div class="menuitem">
+<a href="../../2.1/userdocs/widgetconcepts/validation.html">Validation</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/widgetconcepts/eventhandling.html">Event Handling</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/widgetconcepts/datatypes.html">Datatypes</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/widgetconcepts/selectionlists.html">Selection lists</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/widgetconcepts/widgetstates.html">Widget states</a>
+</div>
+</div>
+<div onclick="SwitchMenu('menu_1.2.5.5.4', '../../skin/')" id="menu_1.2.5.5.4Title" class="menutitle">Form Publishing</div>
+<div id="menu_1.2.5.5.4" class="menuitemgroup">
+<div onclick="SwitchMenu('menu_1.2.5.5.4.1', '../../skin/')" id="menu_1.2.5.5.4.1Title" class="menutitle">Templating</div>
+<div id="menu_1.2.5.5.4.1" class="menuitemgroup">
+<div class="menuitem">
+<a href="../../2.1/userdocs/publishing/templating.html">Section Home</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/publishing/templating/templategenerator.html">Template Generator</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/publishing/templating/templatetransformer.html">Template Transformer</a>
+</div>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/publishing/formsgenerator.html">Generator</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/publishing/xslt.html">XSLT</a>
+</div>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/binding.html">Binding Framework</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/xmlbinding.html">Simple XML Binding</a>
+</div>
+<div onclick="SwitchMenu('menu_1.2.5.5.7', '../../skin/')" id="menu_1.2.5.5.7Title" class="menutitle">API</div>
+<div id="menu_1.2.5.5.7" class="menuitemgroup">
+<div class="menuitem">
+<a href="../../2.1/userdocs/api/api_javascript.html">Javascript (Flowscript)</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/api/api_java.html">Java</a>
+</div>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/formlibraries.html">Form libraries</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/ajax.html">Ajax</a>
+</div>
+<div class="menuitem">
+<a href="http://wiki.apache.org/cocoon/Forms">Forms @ Wiki</a>
+</div>
+</div>
+<div onclick="SwitchMenu('menu_1.2.5.6', '../../skin/')" id="menu_1.2.5.6Title" class="menutitle">XSP</div>
+<div id="menu_1.2.5.6" class="menuitemgroup">
+<div class="menuitem">
+<a href="../../2.1/userdocs/index.html">Overview</a>
+</div>
+<div onclick="SwitchMenu('menu_1.2.5.6.2', '../../skin/')" id="menu_1.2.5.6.2Title" class="menutitle">XSP</div>
+<div id="menu_1.2.5.6.2" class="menuitemgroup">
+<div class="menuitem">
+<a href="../../2.1/userdocs/xsp.html">Section Home</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/xsp/logicsheet.html">XSP Guide</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/xsp/xsp-internals.html">XSP Internals</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/xsp/logicsheet-concepts.html">XSP Logicsheets</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/xsp/sessions.html">Sessions</a>
+</div>
+</div>
+<div onclick="SwitchMenu('menu_1.2.5.6.3', '../../skin/')" id="menu_1.2.5.6.3Title" class="menutitle">Logicsheets</div>
+<div id="menu_1.2.5.6.3" class="menuitemgroup">
+<div class="menuitem">
+<a href="../../2.1/userdocs/logicsheets/request.html">Request</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/logicsheets/session.html">Session</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/logicsheets/esql.html">ESQL</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/logicsheets/logicsheet-forms.html">Forms</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/logicsheets/sendmail.html">Sendmail</a>
+</div>
+</div>
+</div>
+<div onclick="SwitchMenu('menu_1.2.5.7', '../../skin/')" id="menu_1.2.5.7Title" class="menutitle">Offline</div>
+<div id="menu_1.2.5.7" class="menuitemgroup">
+<div class="menuitem">
+<a href="../../2.1/userdocs/offline/index.html">Overview</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/offline/cli.html">Command Line</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/offline/configuration.html">CLI Configuration</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/offline/ant.html">Ant</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/userdocs/offline/bean.html">Cocoon Bean</a>
+</div>
+</div>
+</div>
+<div onclick="SwitchMenu('menu_selected_1.2.6', '../../skin/')" id="menu_selected_1.2.6Title" class="menutitle" style="background-image: url('../../skin/images/chapter_open.gif');">Developer's Guide</div>
+<div id="menu_selected_1.2.6" class="selectedmenuitemgroup" style="display: block;">
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+<a href="../../2.1/developing/index.html">Index</a>
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+<div id="menu_selected_1.2.6.2" class="selectedmenuitemgroup" style="display: block;">
+<div class="menuitem">
+<a href="../../2.1/developing/httprequest.html">Internals</a>
+</div>
+<div class="menupage">
+<div class="menupagetitle">Extending</div>
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+<div class="menuitem">
+<a href="../../2.1/developing/avalon.html">Avalon</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/developing/source.html">Source Handling</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/developing/stores.html">Stores</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/developing/datasources.html">Using Databases</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/developing/parent-component-manager.html">Parent CM</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/developing/deliquick.html">DELI Quick Start</a>
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+<div class="menuitem">
+<a href="../../2.1/developing/deli.html">DELI</a>
+</div>
+</div>
+<div onclick="SwitchMenu('menu_1.2.6.3', '../../skin/')" id="menu_1.2.6.3Title" class="menutitle">Developing Webapps</div>
+<div id="menu_1.2.6.3" class="menuitemgroup">
+<div class="menuitem">
+<a href="../../2.1/developing/webapps/index.html">Overview</a>
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+<div class="menuitem">
+<a href="../../2.1/developing/webapps/session.html">Sessions</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/developing/webapps/contexts.html">Session Contexts</a>
+</div>
+<div onclick="SwitchMenu('menu_1.2.6.3.4', '../../skin/')" id="menu_1.2.6.3.4Title" class="menutitle">Authentication</div>
+<div id="menu_1.2.6.3.4" class="menuitemgroup">
+<div class="menuitem">
+<a href="../../2.1/developing/webapps/authentication.html">Section Home</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/developing/webapps/authentication/authentication-handler.html">The Authentication Handler</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/developing/webapps/authentication/authenticating_user.html">Authenticating a User</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/developing/webapps/authentication/user_management.html">User Management</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/developing/webapps/authentication/application_management.html">Application Management</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/developing/webapps/authentication/module_management.html">Module Management</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/developing/webapps/authentication/user_administration.html">User Administration</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/developing/webapps/authentication/summary.html">Configuration Summary</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/developing/webapps/authentication/pipeline_patterns.html">Pipeline Patterns</a>
+</div>
+</div>
+<div class="menuitem">
+<a href="../../2.1/developing/webapps/forms.html">Simple Forms</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/developing/webapps/portal.html">Portal FW</a>
+</div>
+</div>
+<div onclick="SwitchMenu('menu_1.2.6.4', '../../skin/')" id="menu_1.2.6.4Title" class="menutitle">Building a portal using the Portal Engine</div>
+<div id="menu_1.2.6.4" class="menuitemgroup">
+<div class="menuitem">
+<a href="../../2.1/developing/portal/index.html">Index</a>
+</div>
+<div class="menuitem">
+<a href="../../2.1/developing/portal/portal-block.html">Portal Engine</a>
+</div>
+<div onclick="SwitchMenu('menu_1.2.6.4.3', '../../skin/')" id="menu_1.2.6.4.3Title" class="menutitle">Configuring Coplets</div>
+<div id="menu_1.2.6.4.3" class="menuitemgroup">
+<div class="menuitem">
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+</div>
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+<div id="content">
+<h1>Extending Apache Cocoon</h1>
+<a name="N10007"></a><a name="Introduction"></a>
+<h2 class="h3">Introduction</h2>
+<div class="section">
+<p>If you want to extend the functionality of Apache Cocoon, it may be unclear
+how to achieve your goal. This page tries to indicate when to write what, and to
+give an overview of what already exists (so you don't duplicate other's
+efforts).</p>
+</div>
+<a name="N1000D"></a><a name="When+to+write+a+Generator"></a>
+<h2 class="h3">When to write a Generator</h2>
+<div class="section">
+<p>From the sitemap documentation: "A <tt>Generator</tt> generates XML content
+as SAX events and initializes the pipeline processing. "</p>
+<p>Thus a <tt>Generator</tt> is the starting point of a pipeline: it produces
+the first SAX events on which all other components of the pipeline are
+triggered.</p>
+<p>You may want to write a <tt>Generator</tt> if you want some other basis for
+your SAX events (maybe you want a SAX event every time the temperature of your
+CPU changes?) However, before writing a <tt>Generator</tt> from scratch, it may
+be worthwhile to have a look at <a href="#xsp">XSP</a>, which can create a
+<tt>Generator</tt> for you.</p>
+<p>Existing <tt>Generator</tt>s are:</p>
+<ul>
+
+<li>
+<tt>DirectoryGenerator</tt> - Generates an XML directory listing.</li>
+
+<li>
+<tt>FileGenerator</tt> - Does the job of an XML parser: read an XML file and
+outputs SAX events.</li>
+
+<li>
+<tt>HTMLGenerator</tt> - Takes an HTML URL, makes an XHTML of it, and
+outputs the SAX events caused by this XHTML.</li>
+
+<li>
+<tt>ImageDirectoryGenerator</tt> - An extension of DirectoryGenerators that
+adds extra attributes for image files.</li>
+
+<li>
+<tt>PhpGenerator</tt> - Allows PHP to be used as a generator. Builds upon
+the PHP servlet functionality. Overrides the output method in order to pipe the
+results into SAX events.</li>
+
+<li>
+<tt>RequestGenerator</tt> - [FIXME: This looks like just outputing the
+request headers, the request parameters and the configuration parameters. But I
+don't see any use of it (besides debugging and demonstration). Are there other
+situations in which you might want to use this?]</li>
+
+<li>
+<tt>ServerPagesGenerator</tt> - Makes a <tt>Generator</tt> at compile time,
+based on the <tt>src</tt> file you define in the sitemap. This one is
+responsible for making your XSP pages work.</li>
+
+<li>
+<tt>StatusGenerator</tt> - Generates an XML representation of the current
+status of Cocoon. This can be considered "for administration use", i.e. your
+application probably won't deal with this one.</li>
+
+</ul>
+<p>All these classes are in the <tt>org.apache.cocoon.generation</tt> package.
+In the same package, you find following helper classes and interfaces:</p>
+<ul>
+
+<li>
+<tt>Generator</tt> - The interface you have to implement if you want to
+write a <tt>Generator</tt>.</li>
+
+<li>
+<tt>AbstractGenerator</tt> - Extend this one for easier building of your own
+<tt>Generator</tt>.</li>
+
+<li>
+<tt>AbstractServerPage</tt> - [FIXME: This seems to be intended as basis for
+the <tt>ServerPagesGenerator</tt>, but it seems to be obsolete now?]</li>
+
+<li>
+<tt>ComposerGenerator</tt> - Can be used as base class if you want your
+<tt>Generator</tt> to be an <a href="../../2.1/developing/avalon.html">Avalon Composable</a>.</li>
+
+<li>
+<tt>ServletGenerator</tt> - If you want to generate servlets. This is the
+base class for the <tt>ServerPagesGenerator</tt>.</li>
+
+</ul>
+</div>
+<a name="N10092"></a><a name="When+to+write+a+Transformer"></a>
+<h2 class="h3">When to write a Transformer</h2>
+<div class="section">
+<p>Let's start again from the sitemap documentation: "A <tt>Transformer</tt>
+transforms SAX events in SAX events." In other words, a <tt>Transformer</tt>
+outputs SAX events based on SAX events it receives.</p>
+<p>You can imagine a <tt>Transformer</tt> doing many things, from XSLT
+processing over database querying to sending mail (and much further, of course).
+</p>
+<p>These <tt>Transformer</tt>s are standard available:</p>
+<ul>
+
+<li>
+<tt>LogTransformer</tt> - This is a class that can be plugged into a
+pipeline to print the SAX events which passes through this <tt>Transformer</tt>
+in a readable form to a file. This <tt>Transformer</tt>'s main purpose is
+debugging.</li>
+
+<li>
+<tt>SQLTransformer</tt> - Can be used for querying a SQL database.</li>
+
+<li>
+<tt>XalanTransformer</tt> - Probably the most intuitive
+<tt>Transformer</tt>: it applies an XSL sheet to the SAX events it receives. It
+uses Xalan in the process.</li>
+
+<li>
+<tt>XIncludeTransformer</tt> - To include other XML documents in your "XML
+document" (which at transformation time exists in SAX events).</li>
+
+<li>
+<tt>XTTransformer</tt> - The same as <tt>XalanTransformer</tt>, but this one
+uses XT.</li>
+
+</ul>
+<p>All these classes can be found in <tt>org.apache.cocoon.transformation</tt>,
+along with these helper classes and interfaces:</p>
+<ul>
+
+<li>
+<tt>Transformer</tt> - The interface each Transformer has to implement.</li>
+
+<li>
+<tt>AbstractTransformer</tt> - A helper base class for implementing a
+<tt>Transformer</tt>.</li>
+
+<li>
+<tt>AbstractDOMTransformer</tt> - An Abstract DOM Transformer (helper base
+class), for use when a transformer needs a DOM-based view of the document.</li>
+
+</ul>
+</div>
+<a name="N100E8"></a><a name="When+to+write+a+Serializer"></a>
+<h2 class="h3">When to write a Serializer</h2>
+<div class="section">
+<p>No need for re-inventing the wheel, so let's start again with the sitemap
+documentation: "A <tt>Serializer</tt> transforms SAX events in binary or char
+streams for final client consumption." A <tt>Serializer</tt> is always the last
+step in a pipeline, and gives the client its final result: an HTML page, a nice
+PNG picture, a sound stream, or maybe just an XML document.</p>
+<p>You should write a <tt>Serializer</tt> if you want to serve a client with
+some format that hasn't been provided yet.</p>
+<p>Existing <tt>Serializer</tt>s:</p>
+<ul>
+
+<li>
+<tt>FOPSerializer</tt>- Make PDF files.</li>
+
+<li>
+<tt>HTMLSerializer</tt> - Generate an HTML document.</li>
+
+<li>
+<tt>LinkSerializer</tt>- Show the targets of the links in the document.</li>
+
+<li>
+<tt>SVGSerializer</tt>- To construct an SVG.</li>
+
+<li>
+<tt>TextSerializer</tt> - Generate a text document.</li>
+
+<li>
+<tt>XMLSerializer</tt> - Generate an XML document.</li>
+
+</ul>
+<p>Again, these can be found in the package
+<tt>org.apache.cocoon.serialization</tt>. And this package also includes
+following interfaces and helper classes:</p>
+<ul>
+
+<li>
+<tt>Serializer</tt> - The interface every <tt>Serializer</tt> has to
+implement.</li>
+
+<li>
+<tt>AbstractTextSerializer</tt> - Use this as base for your
+<tt>Serializer</tt> if you want to output a character stream.</li>
+
+<li>
+<tt>AbstractSerializer</tt> - A more general base class.</li>
+
+</ul>
+</div>
+<a name="N1013A"></a><a name="About+Action"></a>
+<h2 class="h3">About Action</h2>
+<div class="section">
+<p>[FIXME: We have to wait until we can see what is going to happen here. Also,
+I wonder if this belongs here or should deserve a separate page.]</p>
+<p>The Action part will be used for making Cocoon able to react on form input.
+This will make Cocoon no longer a simple basis for web publishing, but will make
+it apt for web interaction as well.</p>
+<p>See <a href="../../2.1/userdocs/concepts/actions.html">Actions</a>.</p>
+</div>
+<a name="N10148"></a><a name="About+XSP"></a>
+<h2 class="h3">About XSP</h2>
+<div class="section">
+<p>XSP stands for "eXtensible Server Pages". It is the idea to program
+<tt>Generator</tt>s by means of XML. The basic idea is to put XML tags like
+<tt>&lt;xsp:logic&gt;</tt> in your XML file, with in those tags Java code.</p>
+<div class="frame note">
+<div class="label">Note</div>
+<div class="content">This is not the proper way to use XSP's. I just mentioned them
+here so you wouldn't forget their existence. Look to the
+<a href="../../2.1/userdocs/xsp/../xsp.html">XSP page</a> for more information.</div>
+</div>
+<div class="daisy-edit-link">
+<p>
+<em>Errors and Improvements?</em>
+                 If you see any errors or potential improvements in this document
+                 please help us:
+                <a class="external" href="http://cocoon.zones.apache.org/daisy/legacydocs/612">
+                  View, Edit or comment on
+                </a> the latest development version (registration required).
+              </p>
+</div>
+</div>
+</div>
+<!--+
+    |end content
+    +-->
+<div class="clearboth">&nbsp;</div>
+</div>
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+<script type="text/javascript"><!--
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+</div>
+<div class="copyright">
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+</div>
+<div id="feedback">
+    Send feedback about the website to:
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